Figure 2: Analysis of the symmetrical flagellar beating of T. cruzi. (a) Parasite position and direction of motion (arrows) of four consecutive frames of an epimastigote with forward cell propulsion obtained from the green region of Figure 1. The amplitude and frequency of the flagellar wave were constant and symmetrical. (b) Fixed and superimposed images from panel a. (c) Plots of the movements and displacement of the epimastigote of panel (a). The arrows indicate the symmetry of parasite and flagellar wave contours during the cell displacement.